Heinrich joe-daw



UNITED STATES PATENT OFFICE.

HEINRICH JORDAN, OF LEVERKUSEN, NEAR COLOGNE, GERMANY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE GRASSELLI CHEMICAL COMPANY, OF CLEVELAND,

OHIO, Av CORPORATION OF OHIO.

COTTON DYES.

No Drawing. Application filed September 27,

To all who mit may concern:

Be it known that I, HEINRICH JORDAN, citizen or the German Empire, residing at Leverkusen, near Cologne, Germany, have invented new and useful Improvements in Cotton Dyes, of which the following is a specification.

The present invention relates to the manufacture and production of new and valuable azodyestufi's capable of dyeing cotton pure greenish-blue shades fast to light which dyeings are rendered fast to washing by an after-treatment with formic aldehyde.

The new products are after being; dried and pulverized in the shape of their salts with alkali metals dark powders which are soluble in water with a bluish coloration and soluble in concentrated sulfuric acid generally with agreenish coloration. Upon reduction with stannouschlorid and hydrochloric acid they are broken up into a 1.4:- naphthylenediamin sulfonic acid, an aminooxynaphthalene and 1.3-dioXy-4l-amino loenzene.

The process for producing the new dyes consists in combining diazocompounds of 1- monoacidylamino l aminonaphthalene-6 or Tsultonio acid with l-aminonaphthalene-(S or "(-sulfonic acid or a mixture or". these acids, diazotiaing the resulting intermediate compounds coupling the diazocompounds with beta-naphthol or 2.7-dioxynaphthalene, splitting; ed the acidyl group by saponification, diazotizing and coupling with resorcin.

In order to illustrate the new process more fully the following example is given, the parts by weight 28 parts of l-acetylamino-4-aminonaphthalene-(i-sultonic acid are dissolved in 7 parts of water with the addition of 5.5 parts of sodium carbonate. The resulting solution S ecification of Letters Patent.

1919. Serial No. 326,984.

is acidulated with 28 parts of hydrochloric acid (19 and is diazotized with 6.9 parts of sodium nitrite. The diazocompound: is then added at 10-15 C. to a solution of 22.3 parts of 1-aminonaphthalene 6-sulfonic acid in 1000 parts of water and 5.5 parts of. carbonate of sodium to which solution 16 parts of sodium acetate (100 per cent) had, previously been added and which had been slightly acidulated with hydrochloric acid. The copulation is complete after a short time. The mixture is acidulated by the addition of 56 parts of hydrochloric acid (19 Be.) and diazotized with 6.9 parts of sodium nitrite. The diazosclution is then coupled at 510 C. with a solution of 141.45 parts of beta-naphthol in 600 parts of water and 14;

art of caustic soda lye (36 Be.) to which solution 50 parts oi sodium carbonate has been added. The dye is filteredotf, stirred up with 1500 parts of water. It is heated to boiling, 1 10 parts of caustic: soda lye 36 Be.) are added, the mixture is heated to boiling during a quarter oi an hour, cooled with ice to C. neutralized with hydrochloric acid and filtered off. The paste is stirred up with 1000 parts of water, acidulated with 35 parts of hydrochloric acid (19 Be.) and diazotized at 0-5 C. with 6.9 parts of sodium nitrite. then combined at 0 with a well cooled solution of 11 parts of resorcin in 400 parts of water containing 40 parts of sodium carbonate.

The diazocompound is The dye is salted out and filtered ofli. It is after being dried and pulverized in the shape of its sodium salt adark powder soluble in water with a greenish-blue coloration, soluble in concentrated sulfuric acid with a greyish-green coloration. It. has in a free state most probably the following formula:

Upon treatment with stannous chlorid and 2-naphthol and 1.3-di0Xy-4laminobenzene. 85 hydrochloric acid it is broken up into 1.4- It dies cotton pure greenish-blue shades.

diarninonaphthalene sulfonic acid, l-amino- 1.4:- diaminonaphthalene 7 sulfonic acid naphthol can be substituted for the lxl-diaminonaplv thalene-6-sul'fonic acid, the 1.7-snllonic acid for the 1.6 acid etc. Instead of beta-naphthol the 2.7-di0Xynaphtha-lene can be used.

I claim:

1. The new trisazodyes being derived from 1.d-diaminonaphthalene sulfonic acid, naphthylamin sulfonic: acid a naplithol compound and resorc-in, which are after being dried and pulverized in the shape of their salts with alkali metals dark powders soluble. in water with a bluish coloration, and being soluble in concentrated sulfuric acid generally with a greenish coloration, dyeing cotton pure greenish-blue which is rendered fast to washing by an aftertreatinent with being broken up by treatment with stannous chlorid and hydrochloric acid into L l-diaininonaphthalene sulfonic acid, 1-a1nino-2- and 1.3-dimlyl-aininobenzene: dyeing cotton pure greenish-blue shades which are rendered fast to washingby an aftertreatment with formic aldehyde, substantially as described.

dium salt a dark powder soluble in water with a greenish-blue coloration and being soluble in concentrated sulfuric acid with a greyish-green coloration; having in a free state most probably the following general formula In testimony whereof I have hereunto set my hand in the presence of two subscribing wltnesses.

HEINRICH JORDAN.

Witnesses ALBERT NUFER, FRANCES NUFER. 

